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上学期,我担任了六年级的珠算课,教材内容是以除法为主。在珠算除法放学中,我有如下几点体会:(一)使学生理解和熟记口诀,掌握口诀的用法学好珠算的关键是掌握口诀。我教一位数除法的五种口诀时,先让学生了解口诀的意义和用法:“倍作几”即加一倍的意思,只有用5除时才用;“添作五”是用2、4、6、8除比它们小一倍的数的口诀,商都是5 ;“逢几进几”是在被除数较除数大时用的口诀,如2除4、40、400同样用“逢四进二”这句口诀;“下加几”是用6、7、8、9除时用的口诀,先要使学生明确“下加”的意
Last semester, I served as a sixth-grade abacus class, teaching content is based on division. In abacus school, I have the following experience: (a) to enable students to understand and memorize formulas, master the usage of formulas learn a good abacus is the key to master formulas. When I teach the five formulas of the one-digit division, let the students know the meaning and usage of the formula first: “doubling the number of times” means double the meaning of the formula, only when dividing by five; , 4,6,8 except twice as small as their number of formulas, the business is 5; “every few into a few” is used in the divisor than the large number of divisions, such as 2 divided by 4,40,400 also used “every Four into two ”this formula;“ add a few ”is the formula used when 6,7,8,9 addition, the first students to make clear“ plus ”meaning